Which Yordles should be in the first Expansion?

So who should Rumble invite to school next?
Obviously Teemo should be in it as he is the best champion ever, but who else?
What should their unique abilities be, what level should the ability be unlocked?
Should any non Yordles be allowed in the Mechs vs Minions expansions?
Should Veigar be the villain in the expansion, perhaps controlled by a 5th player who commands the minions?

This board is all about fostering a healthy community in which discussions can revolve around Mechs vs Minions, the board game created by Riot Games:
[Mechs vs Minions](http://na.leagueoflegends.com/en/featured/mechs-vs-minions)
> *** {{champion:53}} : The time of man has come to an end.***